Hi Mcameron, I understand the importance of having a workspace tailored to your needs, and I'll be here to give you some insights.
The reason why you cannot permanently hide the Intuit Intelligence sidebar is that it is a core feature of QuickBooks Online (QBO), designed to provide AI-powered insights and assistance, and currently doesn’t offer a way to hide it.
Although you can minimize it during your session by clicking the collapse arrow, which keeps it tucked away while you're working, it will reappear in a new session by design to ensure accessibility.
If you have any further questions or need additional support, please don't hesitate to reply.